NZTA - SH1 PUHOI TO WARKWORTH:

PROCUREMENT AND INSTALLATION OF N2F 11x 2400mm BARREL CULVERT

CLIENT: NX2 - Northern Express Group Contractor

COMPLETED: ONGOING

This project involved the construction of an unique 11x Barrel Culvert consisting of 11x 2400 dia. culvert pipes and 2x 40mtr Inlet & Outlet Wall Structures across the main new SH1 Motorway alignment.

This culverts main purpose is to drain stormwater away in a one in 100year flood from the low lying farm land areas, due to the SH1 motorway pavement alignment being raised along this section in Warkworth.

P&I developed a pre-construction methodology using 3D modelling to showcase the possible real-time scenarios at site during the construction phase. This model illustrated the clients the step-by-step activity of the process required to manage interactions with the clients concurrent activities along the project critical path.

The methodology also was designed to reduce H&S risks with the interactions between heavy earthmoving machinery and workers on the ground.

Scope of works:

• Dewatering

• Bulk Open earthworks.

• Ground improvement works – Installing raft layers with PET1200 cloth.

• Construction of 11x 2400 dia. Culvert Pipes x 42.5m across the main new SH1 Motorway alignment.

• Construction of 40m long Wingwall Inlet & Outlet Structures. Installing multiple 14T precast concrete panels. Install steel. Pouring concrete blinding, footing, for 2x 40m long base slab installations.